What Type of Gasoline Should the Oshan X5 Use?
2 Answers
The Oshan X5 should use 92-octane gasoline, as recommended in the vehicle's official user manual. In addition to checking the appropriate gasoline grade in the user manual, you can also find this information on the fuel tank cap, where it is usually indicated. Typically, the gasoline grade can also be determined based on the engine's compression ratio. Vehicles with an engine compression ratio between 8.6-9.9 should use 92-octane gasoline, while those with a ratio between 10.0-11.5 should use 95-octane gasoline. If the compression ratio is even higher, 98-octane gasoline is recommended. However, with the application of new technologies, the compression ratio alone cannot determine the appropriate gasoline grade, as high compression ratios can now be adjusted to use lower-octane gasoline. Other factors, such as ignition timing, turbocharging technology, and Atkinson cycle technology, also play a role. Generally, the higher the gasoline octane rating, the higher the octane number and the better the anti-knock performance. 92-octane gasoline contains 92% isooctane and 8% n-heptane, while 95-octane gasoline contains 95% isooctane and 5% n-heptane. If the Oshan X5 occasionally uses the wrong gasoline grade, simply switch back to the correct grade after the current tank is used up. However, prolonged use of the wrong gasoline grade can have the following effects: For vehicles designed for lower-octane gasoline, using a higher-octane grade will not cause damage, but the increased octane number can alter the fuel's ignition point, leading to delayed combustion in the engine. This reduces the engine's power output and thermal efficiency, resulting in poorer performance. For vehicles designed for higher-octane gasoline, using a lower-octane grade can cause engine knocking. The significantly lower octane number lowers the gasoline's ignition point, causing premature ignition during the compression stroke. If combustion occurs before the spark plug ignites, resistance is created during the upward stroke. This resistance makes the engine run very unstably. Mild knocking may only increase noise without obvious engine damage, but severe knocking indicates serious engine issues, affecting not only driving stability but also causing abnormal wear on pistons and cylinders, potentially leading to cylinder scoring.
I've been driving the Oshan X5 for a while now, and there's quite a bit to consider when it comes to refueling. The official manual states that 92-octane gasoline or higher is acceptable, but from my experience, 92-octane works perfectly fine for daily commuting without any issues. If you drive more aggressively or frequently go on long trips, using 95-octane can make the ride smoother and reduce engine noise. However, to be honest, using 95-octane long-term isn't cost-effective, as it's significantly more expensive. A friend of mine once filled up with lower-octane fuel at a small gas station, and the engine warning light came on, so sticking to reputable gas stations is crucial. Before refueling, remember to tighten the fuel cap, and don't overlook the recommended octane rating sticker near the fuel filler—these details matter.
